EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
  • MA1 : Littoral rock
    
  • MA2 : Littoral biogenic habitat
    
    • MA21 : Arctic Littoral biogenic habitat
      
    • MA22 : Atlantic littoral biogenic habitat
      
    • MA23 : Baltic hydrolittoral biogenic habitat
      
    • MA24 : Black sea littoral biogenic habitat
      
    • MA25 : Mediterranean littoral biogenic habitat
      
  • MA3 : Littoral coarse sediment
    
  • MA4 : Littoral mixed sediment
    
  • MA5 : Littoral sand
    
    • MA51 : Arctic littoral sand
      
    • MA52 : Atlantic littoral sand
      
    • MA53 : Baltic hydrolittoral sand
      
    • MA54 : Black sea littoral sand
      
    • MA55 : Mediterranean littoral sand
      
  • MA6 : Littoral mud
    
  • MB1 : Infralittoral rock
    
    • MB11 : Arctic infralittoral rock
      
    • MB12 : Atlantic infralittoral rock
      
      • MB121 : Kelp and seaweed communities on Atlantic infralittoral rock
        
        • MB1211 : Alaria esculenta on exposed Atlantic sublittoral fringe bedrock
          
        • MB1212 : Alaria esculenta forest with dense anemones and crustose sponges on extremely exposed Atlantic infralittoral bedrock
          
        • MB1213 : Laminaria hyperborea forest with a faunal cushion (sponges and polyclinids) and foliose red seaweeds on very exposed Atlantic infralittoral rock
          
        • MB1214 : Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone
          
        • MB1215 : Laminaria hyperborea with dense foliose red seaweeds on exposed Atlantic infralittoral rock
          
        • MB1216 : Laminaria hyperborea and red seaweeds on exposed Atlantic vertical rock
          
        • MB1217 : Laminaria digitata on moderately exposed Atlantic sublittoral fringe rock
          
        • MB1218 : Laminaria hyperborea on tide-swept Atlantic infralittoral rock
          
        • MB1219 : Laminaria hyperborea on tide-swept Atlantic infralittoral mixed substrata
          
        • MB121A : Laminaria hyperborea and foliose red seaweeds on moderately exposed Atlantic infralittoral rock
          
        • MB121B : Dense foliose red seaweeds on moderately exposed Atlantic infralittoral silty rock
          
        • MB121C : Laminaria hyperborea on moderately exposed Atlantic vertical rock
          
        • MB121D : Hiatella arctica and seaweeds on vertical Atlantic littoral limestone / chalk
          
        • MB121E : Laminaria digitata, ascidians and bryozoans on tide-swept Atlantic sublittoral fringe rock
          
        • MB121F : Mixed kelp with foliose red seaweeds, sponges and ascidians on sheltered tide-swept Atlantic infralittoral rock
          
        • MB121G : Mixed kelp and red seaweeds on tide-swept Atlantic infralittoral boulders, cobbles and gravel
          
        • MB121H : Laminaria saccharina with foliose red seaweeds and ascidians on sheltered tide-swept Atlantic infralittoral rock
          
        • MB121J : Filamentous red seaweeds, sponges and Balanus crenatus on tide-swept variable-salinity Atlantic infralittoral rock
          
        • MB121K : Halopteris filicina with coralline crusts on moderately exposed Atlantic infralittoral rock
          
      • MB122 : Seaweed or faunal communities on Atlantic infralittoral rock
        
      • MB123 : Kelp and seaweed communities on sediment-affected or disturbed Atlantic infralittoral rock
        
      • MB124 : Kelp communities on variable salinity Atlantic infralittoral rock
        
      • MB125 : Submerged fucoids, green or red seaweeds on low salinity Atlantic infralittoral rock
        
      • MB126 : Faunal communities on variable or reduced salinity Atlantic infralittoral rock
        
      • MB127 : Communities of surge gullies and caves on Atlantic infralittoral rock
        
      • MB128 : Vents and seeps in Atlantic infralittoral rock
        
    • MB13 : Baltic infralittoral rock
      
    • MB14 : Black Sea infralittoral rock
      
    • MB15 : Mediterranean infralittoral rock
      
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
  • MC2 : Circalittoral biogenic habitat
    
    • MC21 : Arctic circalittoral biogenic habitat
      
    • MC22 : Atlantic circalittoral biogenic habitat
      
    • MC23 : Baltic circalittoral biogenic habitat
      
    • MC24 : Black Sea circalittoral biogenic habitat
      
    • MC25 : Mediterranean circalittoral biogenic habitat
      
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
  • MD1 : Offshore circalittoral rock
    
  • MD2 : Offshore circalittoral biogenic habitat
    
  • MD3 : Offshore circalittoral coarse sediment
    
  • MD4 : Offshore circalittoral mixed sediment
    
  • MD5 : Offshore circalittoral sand
    
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
  • ME3 : Upper bathyal coarse sediment
    
  • ME4 : Upper bathyal mixed sediment
    
  • ME5 : Upper Bathyal sand
    
  • ME6 : Upper Bathyal mud
    
  • MF1 : Lower bathyal rock
    
  • MF2 : Lower bathyal biogenic habitat
    
  • MF3 : Lower bathyal coarse sediment
    
  • MF4 : Lower bathyal mixed sediment
    
  • MF5 : Lower bathyal sand
    
  • MF6 : Lower bathyal mud
    
  • MG1 : Abyssal rock
    
  • MG2 : Abyssal biogenic habitat
    
  • MG3 : Abyssal coarse sediment
    
  • MG4 : Abyssal mixed sediment
    
  • MG5 : Abyssal sand
    
  • MG6 : Abyssal mud
    
• MH : Pelagic water column
  
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats